Duplicated IP address detected

Background information

A routine traffic monitoring grab package, let me see a lot of wireshark expert information in the Duplicate IP Address configured (IP XXXXX), this information appears on the machine is very regular. The machines are basically some old R710 machines, and then all 2008 R2 systems, and they all use BroadCom Advanced control suite to do Team,Team mode (smart,LiveLink is not enabled)

The arp packet in the actual symptom wireshark, which can be seen as multiple network cards in a team, all declares that its MAC address corresponds to the cluster IP, and the time interval of this ARP package is very small.

Broadcom Network Card team Software ()

Machines that use R710 but use the Team feature built into the windows server 2012 system do not show this symptom. Try to fix

It is probably certain that it should be the BUG of the software, so let's see if anyone has similar symptoms, or there is a solution.

I found the following related articles and links. The official instruction is that the team version of the Broadcom Nic is older and will be OK after updating to a specific version.

Dell Kb

Dell Community user question

Although the driver of the official website is very difficult to find after the acquisition of Broadcom, I found the new driver and application of the corresponding network card in the driver page of dell.

Updated Qlogic Network Adapter windows 64 bit drivers and firmware, which may lead to network disconnection or loss of cluster IP. Anyway, after the twists and turns, it feels that the problem is about to be solved. As a result, the problem remains the same after the update.

Updated network card team management software.

After verification, it was found that the problem was not solved.

After I updated the firmware of the network card and the Team software on multiple servers, I rebooted and verified. The packet grabbing tool uses the netsh trace command that comes with windows. Since most of the machines are windows server 2008 R2, I use the following command to grab the packet netsh trace start capture=yes tracefile=c:\ computername.etl after waiting for a period of time, then use netsh trace stop to stop the crawling. Etl files can be converted to cap packages using windows message analyzer, and then analyzed using wireshark.

The provable solution is that if you have two network cards and are still in smart mode, you can set one of them as standby mode. Not all Active.

After the question was submitted to DELL, dell replied that the server was insured. It is also true that the upgrade in accordance with KB has not been solved, and we can only get rid of BUG with the problem of overinsurance. fortunately, we know what the problem is. When we upgrade OS, we can use built-in Team or change to this team software, but the Team mode is changed to active / standby mode. It is estimated that the throughput can not be doubled in Active,active mode with more than 2 network cards, because the Team mode included in OS can only double in one direction at most.